Oh, goodness. It's been years since I looked at the sky that closely.Hey, Rinnosuke-san. Have you ever seen this thing with a long tail flying through the sky at night?Hmm.Recently I've been seeing a bunch of them right after sunset.Uh-huh.
and such.
Like, zyuum
My deduction tells me you're talking about meteors... or a comet, perhaps...A comet's a star with a huge trail that arrives in the sky once in a cycle of several years.